The Mastic Doctor team standing beside their branded vans outside an office building
Buckinghamshire · England

Fire-rated sealing and fire stopping in Poundon, Buckinghamshire

We carry out fire-rated and intumescent sealing of service penetrations and linear gaps in Poundon. Send photos or drawings for a fixed quote.

  • Fire sealant pulled out of the opening
  • Fire seals cut back for extra cables and never reinstated
  • Unsealed penetrations discovered above suspended ceilings
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
Constructionline member
£5m public liability

Fire stopping in Poundon

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Fire stopping in Poundon

The test standards are BS EN 1366-3 for penetration seals and BS EN 1366-4 for linear joints and the results are classified to BS EN 13501-2. A rating such as EI 60 only holds when the product is installed as it was tested. Reproducing the tested arrangement on site is the part we take care of. If you’re dealing with service penetrations left open after M&E works and open linear gaps along the top of fire-resisting walls, we can help. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Poundon, that means joint design, primers and backing rod as standard.

Smaller places such as Poundon still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. Any service penetration through those walls should be closed with the specified product, set out as its test evidence shows.

Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.

Where
Poundon (OX27)
Wider area
Buckinghamshire
Guarantee
A 12-month guarantee
Quotes
Fixed quote, scope in writing
Call
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

How a job runs

Diagnose, treat, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. For a building around Poundon, tell us how to find it and who will meet us. Send that with the details and we will confirm the plan with the quote.

  1. The specification and schedule come first, so we know which details apply.
  2. Access, permits and the order of areas are agreed with the site team.
  3. We compare every service penetration with its tested detail before sealing.
  4. Unsuitable material is removed and the opening cleaned.
  5. The specified backing and sealant go in to depth and are finished neatly.
  6. Anything outside the detail is reported to you rather than sealed.

Preparing the site

  • Let building users know which areas are affected
  • Flag any permit to work we’ll need
  • Agree which areas must stay open

Ask for a quote

Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. The easiest way is to ring 01277 525 020 or email the details over.

Get a quick quote

Read more

Questions about Poundon

Does your area include sites such as Tower Hill Business Park, near Poundon?

Yes. We cover Poundon and the area around it, including industrial estates, business parks and retail parks such as Tower Hill Business Park. To start, just speak to us on 01277 525 020 or send details through our quote form with the unit, the joints involved and your access times.

How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Poundon?

From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.

Is it fine to apply new sealant on top of old?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

Will you quote for a small job?

We quote for single jobs as well as large packages and programmes. Photos and a description are enough to start.

What hours do you work?

The office is staffed Monday to Friday, from 8am until 5pm. Tell us your site hours and access windows and the work will be fitted around them.

How do we ask for a quote?

There are four steps: send details, get a quote, we seal, guaranteed. Step one needs little more than photographs and a postcode.

Can weather delay the job?

It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Internal work is far less affected.

Service penetrations in Poundon buildings

In England, Approved Document B covers fire stopping of openings and penetrations. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail. Poundon lies roughly 51 miles out from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal.

Hospital estates such as Bicester Community Hospital, 4.6 miles south-west of Poundon, are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.

Poundon is about 4 miles east of Bicester, in Buckinghamshire. Poundon sits inside our coverage and the rest of Buckinghamshire, with the same fixed quotes and 12-month guarantee as everywhere else. 308 places across Buckinghamshire fall within our area, including Poundon. Oxford is covered too, around 14 miles from Poundon.

Commercial sites across OX27 are covered. Sites close to Poundon are covered too, including Twyford (1 mile north-east), Marsh Gibbon (2 miles south), Charndon (2 miles south-east), Calvert (3 miles east) and Preston Bissett (3 miles north). Further afield, our area takes in Aylesbury (13 miles south-east), Buckingham (6 miles north-east), Elmhurst (13 miles south-east), Southcourt (13 miles south-east), Haydon Hill (11 miles south-east) and Turnfurlong (14 miles south-east).

Around Poundon

Recent enquiries here include premises near The Sow and Pigs pub, among other places. Poundon’s nearest station is Bicester North station, roughly 4.1 miles west of the centre. A little further out are Bicester Community Hospital (4.6 miles south-west). Not far away are Graven Hill and Calvert Jubilee.

Map of Poundon © OpenStreetMap contributors

What we are called out for in Poundon

A common fault is a product that was never fire-rated in the first place: expanding foam or a general-purpose sealant pushed into a gap to tidy it. It may look closed, but it has no tested fire performance in that position, so it has to come out.

These are often picked up first by site or facilities staff:

  • Fire-stopping items raised at inspection or handover
  • Unsealed joints where partitions meet the slab
  • Unsealed openings around new pipes and cables
  • Damaged fire seals in risers and voids

On a site such as Tower Hill Business Park (0.7 miles west of Poundon), every fit-out that runs new services through a compartment wall leaves penetrations to seal with the specified product.

Questions to ask before you book

  • Their pre-qualification and accreditations
  • Whether old or failed sealant will be cut out, not overlaid
  • Their public liability cover
  • Whether their applicators hold CSCS cards

Choosing a commercial sealant contractor

What the job involves on each surface

Small ducts

Small ductwork can sometimes be sealed with sealant where the tested detail includes it. Bigger ducts and fire-resisting ductwork are normally handled with other products.

Linear joints

Joints at the top of partitions may need to move as the slab above deflects. We use the product and backing the detail names for that movement, with no gaps along the run.

Doing it in-house

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.

Why deal with it now?

An open or wrongly sealed service penetration lets fire and smoke reach the next compartment much sooner than the building was designed for. Putting it right is usually a modest job when the openings are accessible. Wait until ceilings close or areas are occupied and the same work becomes harder to reach. One visit to deal with every failing joint makes more sense than several trips to a place like Poundon. Send photos of each area and we’ll quote for the lot.

The product called for affects the cost, as does the preparation each joint needs, from cutting out to priming and backing rod. Access, phasing and site rules also count.

Why us?

  • Work carried out by CSCS-carded applicators
  • A fixed quote before work starts
  • A Constructionline member, so easy to vet
  • Over 20 years of commercial sealing

Read what affects the cost or how we’re accredited.

For managing agents and facilities managers

Main contractors use us as their sealant subcontractor. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.

FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.

Accreditations

Trusted. Accredited. Insured.